<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">
            添加分类
          </el-button>
        </el-col>
      </el-row>
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-row-hover
        show-index
        index-text="#"
      >
        <template slot="isOk" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
          >
            二级
          </el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit">
            编辑
          </el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">
            删除
          </el-button>
        </template>
      </tree-table>
      <el-pagination
        @size-change="SizeChange"
        @current-change="CurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
      <el-dialog
        title="添加分类"
        :visible.sync="addCateDialogVisible"
        width="30%"
        @close="addCateDialogClose"
      >
        <el-form
          :model="addCateForm"
          :rules="addCateRules"
          ref="addCateForm"
          label-width="100px"
          class="demo-ruleForm"
        >
          <el-form-item label="分类名称:" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类:">
            <el-cascader
              v-model="cateValueSaveById"
              :options="parentCateList"
              :props="cateProps"
              @change="parentCateChange"
              clearable
            ></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addCate">
            确 定
          </el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      queryInfo: {
        type: '',
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isOk'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_pid: 0,
        cat_name: '',
        cat_level: 0
      },
      addCateRules: {
        cat_name: [
          {
            required: true,
            message: '请输入分类名称',
            trigger: 'blur'
          }
        ]
      },
      parentCateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover',
        checkStrictly: true
      },
      cateValueSaveById: []
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类信息失败')
      }
      this.cateList = res.data.result
      this.total = res.data.total
    },
    SizeChange(pagesize) {
      this.queryInfo.pagesize = pagesize
      this.getCateList()
    },
    CurrentChange(currentPage) {
      this.queryInfo.pagenum = currentPage
      this.getCateList()
    },
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      if (res.meta.status !== 200) {
        this.$message.error('获取父级分类失败')
      }
      this.parentCateList = res.data
    },
    parentCateChange() {
      if (this.cateValueSaveById.length > 0) {
        console.log(this.cateValueSaveById.length)
        this.addCateForm.cat_pid = this.cateValueSaveById[
          this.cateValueSaveById.length - 1
        ]
        this.addCateForm.cat_level = this.cateValueSaveById.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCateForm.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClose() {
      this.$refs.addCateForm.resetFields()
      this.cateValueSaveById = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    }
  }
}
</script>

<style lang="less" scope>
.el-cascader {
  width: 100%;
}
.el-cascader-panel {
  height: 300px;
}
</style>
